# TODO: Hide .php Extensions from URLs

## Overview
Implement URL rewriting to allow navigation by page names without .php extensions. This involves updating all internal links in PHP files to remove .php and ensuring .htaccess handles the rewriting.

## Steps
- [x] Create .htaccess file with URL rewriting rules
- [x] Update links in index.php (renamed to home.php)
- [x] Update links in includes/header.php
- [ ] Update links in includes/footer.php
- [ ] Update links in category.php
- [ ] Update links in post.php
- [ ] Update links in surveys.php
- [ ] Update links in admin/includes/admin_header.php
- [ ] Update links in admin/posts.php
- [ ] Update links in admin/categories.php
- [ ] Update links in admin/surveys.php
- [ ] Update links in admin/edit_post.php
- [ ] Update links in admin/announcements.php
- [ ] Update links in admin/add_post.php
- [ ] Update links in admin/dashboard.php
- [ ] Update links in admin/account.php
- [ ] Test navigation to ensure URLs work without .php

## Payment Process Flow Implementation

### Overview
Added the payment process flow for initiating course payments as specified in the Mermaid diagram.

### Changes Made
- [x] Created `supabase/Payment process flow.txt` with the Mermaid diagram
- [x] Updated `checkout.php` to redirect to `student/dashboard.php` after successful payment instead of `profile.php`
- [x] Created `receipt.php` page for displaying payment confirmation and receipt
- [x] Enhanced error handling in `checkout.php` with modal dialog for payment failures, allowing users to retry with different payment methods
- [x] Added `showPaymentError()` and `retryPayment()` functions to improve user experience on payment failures

### 3. Payment Processing Flow:
- [x] Add to Cart - via addToCartFromDashboard()
- [x] View Cart - Cart display + modal checkout view
- [x] Checkout - showDashboardCheckoutModal() with order summary
- [x] Discount Codes - validateDashboardDiscountCode()
- [x] Payment Methods - Paynow and PayPal options
- [x] Free Enrollment - processFreeEnrollment() for free courses
- [x] Paid Enrollment - processDashboardPayment() with gateway integration
